AI Article Synopsis
- Researchers explore how symmetry in a magnetic crystal can conceal the order parameter related to continuous phase transitions.
- Standard x-ray and magnetic neutron Bragg diffraction can't detect this hidden order due to symmetry restrictions on atomic movement and magnetic dipoles.
- They analyze magnetic space-groups to reveal the properties of the concealed order and apply their findings to the well-studied material URu2Si2, critically assessing existing data on magnetic neutron diffraction.
Article Abstract
We investigate how the order parameter of a continuous phase transition can be protected from view by symmetry in a magnetic crystal. The symmetry in question forbids atomic displacements and formation of magnetic dipoles, rendering the order parameter invisible in standard x-ray and magnetic neutron Bragg diffraction. Analysis of the allowed magnetic space-groups reveals exact properties of the hidden order parameter. We demonstrate that Bragg spots forbidden by the chemical structure can unveil magnetic hidden order. The method is applied to URu2Si2, which has been thoroughly investigated in the past few decades using all manner of experimental techniques. Starting from the established chemical structure of URu2Si2, we have performed a critical analysis of available data for magnetic neutron Bragg diffraction.
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| http://dx.doi.org/10.1088/0953-8984/26/4/046003 | DOI Listing |
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